An automatic welding production line for refrigerator cover

Abstract

The application discloses a refrigerator shield automatic welding production line, and relates to the technical field of refrigerator product assembly, which comprises a first conveying device, a double-layer speed chain device, a feeding device, a welding device, a carrying device, a second conveying device and a transfer device. The automatic welding production of the refrigerator shield is realized through the cooperation between the devices. Only one person is needed to complete the feeding of the refrigerator shield body and the feeding of the first welding piece or the second welding piece to the feeding device, so that the required human resources are greatly saved, cost reduction and benefit increase are facilitated, the yield of the produced products is greatly improved, the overall production efficiency is compact compared with manual operation, the production capacity is improved, and large-batch production in a short time is realized.

Description

Technical Field

[0001] This invention relates to the field of refrigerator product assembly technology, and in particular to an automatic welding production line for refrigerator covers. Background Technology

[0002] Currently, to improve the overall structural strength of refrigerator covers, both sides of the main body require welding of first and second welding components. The existing processes for welding the first and second welding rods to the main body are mostly manual, with low automation. The welding process is as follows: one worker places the main body on a conveyor line; the next batch of workers places the first and second welding rods onto the main body on the conveyor line; the next batch of workers uses a welding machine to weld the first and second welding rods onto the main body; the last batch of workers inspects the welded refrigerator cover, and if there are no problems, moves it to the next conveyor line. This manual operation has many problems: on the one hand, the labor costs are huge; on the other hand, the welding quality cannot be guaranteed, and production efficiency cannot be improved. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, embodiments of the present invention provide an automated welding production line for refrigerator covers, in which most of the manual operations are replaced by machine operations to achieve automated welding of refrigerator cover products, effectively improving production efficiency. Furthermore, only one person is needed to oversee an entire production line.

[0004] An automatic welding production line for refrigerator covers according to an embodiment of the present invention includes a first conveying device, a double-layer speed-multiplying chain device, a feeding device, a welding device, a handling device, a second conveying device, and a transfer device. The double-layer speed-multiplying chain device includes an upper conveyor chain and a lower conveyor chain with opposite conveying directions. Multiple loading trays for positioning the main body of the refrigerator cover flow on both the upper and lower conveyor chains. The upper conveyor chain is provided with a first working station, a second working station, a third working station, and a fourth working station. A lifting device is mounted on the lower conveyor chain, facing the third working station, and is used to lift the loading tray stopped at the third working station. The first conveying device is connected to one end of the double-layer speed-multiplying chain device and is used to transfer empty loading trays flowing on the lower conveyor chain to the upper conveyor chain. The second conveying device is connected to the other end of the double-layer speed-multiplying chain device and is used to transfer empty loading trays flowing on the upper conveyor chain. The empty loading pallet on the upper conveyor is transferred to the lower conveyor chain; there are two unloading devices, which are respectively arranged on both sides of the double-speed chain device. The unloading device includes a storage component, a distribution component, and a multi-axis picking robot. The storage component is used to stack the first and second welded parts. The distribution component is used to lift the first and second welded parts stacked on the storage component to a designated position, so that the multi-axis picking robot can transport the first and second welded parts that have reached the designated position to the refrigerator cover body positioned on the loading pallet stopped at the second working station; the welding device includes two welding machines symmetrically arranged on both sides of the double-speed chain device. The welding machines cooperate with the lifting device to weld the first and second welded parts on the loading pallet stopped at the third working station to the refrigerator cover body; the transport device is set up at the fourth working station and is used to transport the welded refrigerator cover to the transfer device.

[0005] Furthermore, the storage assembly includes a first motor and a mounting component. The mounting component is horizontally positioned and rotatable along its central axis. Storage compartments are provided on both sides of the mounting component. Each storage compartment includes a first storage cell and a second storage cell arranged vertically. The first storage cell is used to stack a first welded component, and the second storage cell is used to stack a second welded component. The storage compartments on both sides of the mounting component are symmetrically arranged around the rotational central axis of the mounting component. The first motor drives the mounting component to rotate via belt drive.

[0006] Furthermore, the storage compartment has three vertical bars arranged at intervals. The middle bar has a first channel and a second channel on both sides. One of the two bars faces the middle bar and has the first channel. The two first channels combine to form the first storage compartment. The other bar faces the middle bar and has the second channel. The two second channels combine to form the second storage compartment.

[0007] Furthermore, the material distribution assembly includes a second motor, a first lead screw transmission structure, and a material distribution block. The first lead screw transmission structure is vertically arranged, and the material distribution block is mounted on the moving slider of the first lead screw transmission structure. The second motor drives the first lead screw transmission structure to move the material distribution block vertically upward or downward via belt transmission. The material distribution block is provided with two lifting parts. The mounting part is provided with a hollow groove at the position opposite the first storage cell and the second storage cell. When the storage compartment rotates to above the lifting parts, the two lifting parts can pass through the hollow grooves and enter the first storage cell and the second storage cell respectively.

[0008] Furthermore, the highest point of the storage compartment is the designated location, and the material distribution component also includes a first sensor for detecting whether there is a first welded component and a second welded component at the designated location.

[0009] Furthermore, the first lead screw transmission structure includes a guide rod and a lead screw that are parallel to each other. The guide sleeve of the guide rod and the lead screw nut of the lead screw are both fixedly connected to the moving slider. A second sensor and a third sensor for sensing the moving slider are respectively provided at both ends of the first lead screw transmission structure. When the second sensor senses the moving slider, the highest point of the supporting part is level with the designated position. When the third sensor senses the moving slider, the highest point of the supporting part is lower than the mounting part.

[0010] Furthermore, the welding device also includes an adjustment base. Both welding machines are slidably mounted on the adjustment base via a guide rail slider structure. A third motor and a second lead screw transmission structure are provided on the adjustment base corresponding to the positions of the welding machines. The third motor is connected to the welding machine via the second lead screw transmission structure, so that the two welding machines can move closer or further apart.

[0011] Furthermore, the welding machine includes an integrated housing and a welding structure disposed in the integrated housing. The welding structure includes multiple sets of welding electrode heads for welding. The welding electrode heads are slidably connected to the integrated housing via a guide rail slider structure so that the welding electrode heads can slide in the horizontal direction. An adjustment structure consisting of a lead screw and a hand crank is also provided between the welding electrode heads and the integrated housing to adjust the distance between two adjacent sets of welding electrode heads.

[0012] Furthermore, the lifting device includes a mounting frame, a lifting cylinder, and a support plate. The mounting frame is mounted on the lower conveyor chain. The support plate is slidably connected to the mounting frame through multiple sets of guide rods and guide sleeves, so that the support plate can be raised and lowered. The lifting cylinder is fixed in the middle of the mounting frame, and the cylinder rod of the lifting cylinder is connected to the support plate. The side of the support plate used to support the loading pallet is provided with a receiving electrode head.

[0013] Furthermore, the conveying device includes a gantry frame, a first linear module, a second linear module, a third linear module, and a suction cup. The gantry frame is mounted above the double-speed chain device. The first linear module is horizontally mounted on the gantry frame. The second linear module is mounted on the motion module of the first linear module via a connecting plate. The second linear module is horizontally positioned, and its orientation is parallel to that of the double-speed chain device. The orientation of the first linear module is perpendicular to that of the double-speed chain device. The third linear module is mounted on the motion end of the second linear module. The suction cup is fixed to the motion end of the third linear module. Through the cooperation of the first linear module, the second linear module, and the third linear module, the suction cup can move back and forth between the fourth working station and the transfer device. The suction cup is used to pick up the refrigerator cover welded on the fourth working station.

[0014] Based on the above technical solution, the embodiments of the present invention have at least the following beneficial effects:

[0015] 1. The refrigerator cover body is manually placed onto the loading pallet stopped at the first working station. The upper conveyor chain transports the loading pallet containing the refrigerator cover body to the second, third, and fourth working stations in sequence. The feeding device automatically feeds the first and second welding parts, which previously required manual placement. Then, the welding machine and the lifting device work together to achieve automatic welding. There is no need for personnel to check whether the first or second welding parts are missing or whether there are any gaps in the welding between the first or second welding parts and the refrigerator cover body. After welding, the formed refrigerator cover is transported to the transfer device by the handling device and transferred out. The refrigerator cover is automatically welded and formed. The entire production line only requires one person to complete the feeding of the refrigerator cover body and the preparation of the first or second welding parts to the feeding device, which greatly saves the required manpower, helps to reduce costs and increase efficiency, and greatly improves the yield of the produced products.

[0016] 2. Through the cooperation of the first conveying device, the double-speed chain device and the second conveying device, the loading pallet circulation is realized. Each station can work at the same time. The production time of one refrigerator cover is equal to the time required by the longest station. Compared with manual operation, the overall production efficiency is compact, which is conducive to improving production capacity and realizing mass production in a short time. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present invention. Figure 1 ;

[0019] Figure 2 This is a structural schematic diagram of an embodiment of the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the structure of the double-layer speed-doubling chain in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the feeding device in an embodiment of the present invention. Figure 1 ;

[0022] Figure 5 This is a schematic diagram of the feeding device in an embodiment of the present invention. Figure 2 ;

[0023] Figure 6 This is a schematic diagram of the welding device in an embodiment of the present invention. Figure 1 ;

[0024] Figure 7 This is a schematic diagram of the welding device in an embodiment of the present invention. Figure 2 ;

[0025] Figure 8 This is a schematic diagram of the lifting device in an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the transport device in an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the loading pallet in an embodiment of the present invention;

[0028] Figure 11 This is a schematic diagram of the structure of a welded refrigerator cover in an embodiment of the present invention. Detailed Implementation

[0029] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0033] like Figure 11The schematic diagram of the refrigerator cover 800 shown indicates that the refrigerator cover 800 includes a refrigerator cover body 810, two first welded parts 820, and two second welded parts 830. One first welded part 820 and one second welded part 830 are welded to each end of both sides of the refrigerator cover body 810 to strengthen the overall structure of the refrigerator cover 800. In order to realize the automated production of the refrigerator cover 800 and to facilitate the positioning of the first welded parts 820 and the second welded parts 830 on the refrigerator cover body 810, positioning holes are provided on the first welded parts 820, the second welded parts 830, and the refrigerator cover body 810.

[0034] Reference Figure 1 and Figure 2 The present invention provides an automatic welding production line for refrigerator covers 800, which can realize automatic welding of refrigerator covers 800. Specifically, it includes a first conveying device 200, a double-layer double-speed chain device 100, a feeding device 400, a welding device 500, a handling device 600, a second conveying device 900, and a transfer device 700.

[0035] Among them, such as Figure 3 As shown, the double-layer speed-multiplying chain device 100 includes an upper conveyor chain 101 and a lower conveyor chain 102 with opposite conveying directions. Multiple loading trays 300 for positioning the refrigerator cover body 810 flow on both the upper and lower conveyor chains 101 and 102. The upper conveyor chain 101 is equipped with a first working station, a second working station, a third working station, and a fourth working station. A lifting device 120 is mounted on the lower conveyor chain 102, directly facing the third working station. The lifting device 120 is used to lift the loading tray 300 stopped at the third working station. Further, the upper conveyor chain... The conveyor chain 101 is equipped with multiple interception components 110 for stopping the loading pallet 300. The interception component 110 includes a cylinder and a stop bar. When it is necessary to intercept the loading pallet 300 being conveyed on the upper conveyor chain 101, the cylinder drives the stop bar to rise to a position higher than the loading pallet 300 so that the loading pallet 300 can be intercepted, facilitating the operation of other devices at each workstation. It should be noted that at least one interception component 110 is provided between the first workstation and the second workstation, between the second workstation and the third workstation, and between the third workstation and the fourth workstation.

[0036] Furthermore, the first conveying device 200 is connected to one end of the double-layer speed-multiplying chain device 100. The first conveying device 200 is used to transfer empty loading pallets 300 flowing on the lower conveyor chain 102 to the upper conveyor chain 101. The second conveying device 900 is connected to the other end of the double-layer speed-multiplying chain device 100. The second conveying device 900 is used to transfer empty loading pallets 300 flowing on the upper conveyor chain 101 to the lower conveyor chain 102. Specifically, the first conveying device 200 includes a frame, on which a lifting platform is provided. The frame is also equipped with a cylinder, which drives the lifting platform to move up and down. Multiple rotatable shafts are laid on the lifting platform, and a motor drives the multiple shafts to rotate simultaneously in the same direction so that the lifting platform can receive or send out loading pallets 300. It should be noted that the first conveying device 200 and the second conveying device 900 have the same structure. In use, the lifting platform of the first conveying device 200 is lowered to the same position as the loading platform. The lower conveyor chain 102 docks. When the transport platform of the first conveyor device 200 receives an empty loading pallet 300 and the empty loading pallet 300 is transported to its position, the transport platform of the first conveyor device 200 rises to dock with the upper conveyor chain 101. The received empty loading pallet 300 is transported towards the upper conveyor chain 101 via the rotating shaft on the transport platform. The transport platform of the second conveyor device 900 initially docks with the upper conveyor chain 101. When the transport platform of the second conveyor device 900 receives... Once the empty loading pallet 300 is in place, the platform of the second conveyor 900 descends to connect with the lower conveyor chain 102. The received empty loading pallet 300 is then transported toward the lower conveyor chain 102 via a rotating shaft on the platform. Through the cooperation of the first conveyor 200, the second conveyor 900, the upper conveyor chain 101, and the lower conveyor chain 102, the loading pallet 300 is cyclically transferred without manual intervention, greatly saving manpower.

[0037] In this embodiment, two feeding devices 400 are provided, which are respectively arranged on both sides of the double-layer double-speed chain device 100. The feeding device 400 includes a storage component, a distribution component, and a multi-axis picking robot 410. The storage component is used to stack the first welded part 820 and the second welded part 830. The distribution component is used to lift the first welded part 820 and the second welded part 830 stacked on the storage component to a designated position, so that the multi-axis picking robot 410 can transport the first welded part 820 and the second welded part 830 that have reached the designated position to the refrigerator cover body 810 positioned on the loading tray 300 stopped at the second working station, thereby realizing the automated feeding of the first welded part 820 and the second welded part 830.

[0038] The welding device 500 includes two welding machines 520 symmetrically arranged on both sides of the double-speed chain device 100. The welding machines 520 cooperate with the lifting device 120 to weld the first welding component 820 and the second welding component 830, which are stopped on the loading pallet 300 at the third working station, to the refrigerator cover body 810. Specifically, during welding, the loading pallet 300 is stopped at the third working station by the intercepting component 110, and then the lifting device 120 lifts the loading pallet 300 away from the upper conveyor chain 101 and lifts it to dock with the welding end of the welding machine 520, ensuring that the upper conveyor chain 101 does not bear the pressure during welding. It should be noted that the lifting device 120 is equipped with a lower electrode connected to the negative terminal of the welding power source. When the welding machine 520 applies pressure during welding, a conductive circuit is formed to complete the welding.

[0039] The conveying device 600 is installed at the fourth work station. When the welded refrigerator cover 800 is transported to the fourth work station along with the loading pallet 300, the loading pallet 300 is intercepted by the interception component 110, and then the conveying device 600 can transport the welded refrigerator cover 800 to the transfer device 700. The transfer device 700 is located on one side of the double-speed chain device 100 and close to the second conveying device 900. Preferably, the transfer device 700 is a belt conveyor line.

[0040] The specific production process is as follows: Through the cooperation of the first conveyor device 200, the second conveyor device 900, the upper conveyor chain 101, and the lower conveyor chain 102, the loading pallet 300 is cyclically transferred. The intercepting component 110 at the front end of the first workstation stops the empty loading pallet 300, and the refrigerator cover body 810 is manually loaded onto the loading pallet 300. After loading is completed, when a preset time is reached, the upper conveyor chain 101 drives the loading pallet 300 loaded with the refrigerator cover body 810 towards the second workstation. The intercepting component 110 at the front end of the second workstation stops the loading pallet 300 loaded with the refrigerator cover body 810. Then, the multi-axis picking robot 410 moves to sequentially remove the first welded part 820 and the second welded part 830 placed in designated positions and places them in the relevant positions on both sides of the refrigerator cover body 810. The two multi-axis picking robots 410 work simultaneously. After unloading is completed, when a preset time is reached, the upper conveyor chain 101 drives the loading pallet 300 of the second workstation towards the third workstation. The workstation moves, and the intercepting component 110 at the front end of the third workstation stops the loading tray 300 carrying the assembled refrigerator cover 800. Then, the lifting device 120 lifts the loading tray 300 away from the upper conveyor chain 101 to ensure that the upper conveyor chain 101 is not subjected to the pressure during welding. At the same time, the lifting device 120 lifts the loading tray 300 to dock with the welding end of the welding machine 520 to complete the welding, realizing the automatic welding of the assembled refrigerator cover 800. After welding is completed, when the preset time is reached... The upper conveyor chain 101 drives the loading pallet 300 of the third working station to move towards the fourth working station. The intercepting component 110 at the front end of the fourth working station stops the loading pallet 300, which is loaded with the welded refrigerator cover 800. Then the conveying device 600 is activated to pick up the refrigerator cover 800 on the loading pallet 300 and transport it to the transfer device 700. The transfer device 700 then transports the welded refrigerator cover 800 to the lower production line, thus completing the automatic production of one refrigerator cover 800.

[0041] Compared to existing manual welding operations, the automatic welding production line for refrigerator covers 800 provided in this embodiment of the invention eliminates the need for manual inspection. Automatic feeding of the first welding component 820 and the second welding component 830 ensures no omissions. Automatic welding also ensures worker safety and prevents accidents, minimizing the risk of missed welds. After welding, the completed refrigerator cover 800 is automatically transported to the transfer device 700 via the handling device 600, achieving automatic welding of the refrigerator cover 800. Only one person is needed to feed the refrigerator cover body 810 and prepare the first or second welding component to the unloading device 400, significantly reducing manpower and improving efficiency. Furthermore, the yield rate of the produced products is greatly improved. In addition, each workstation can work simultaneously; the production time for one refrigerator cover 800 is equal to the time required by the longest workstation. Compared to manual operation, the overall production efficiency is more compact, which helps increase production capacity and achieve large-scale production in a short time.

[0042] like Figure 4 and Figure 5As shown, the feeding device 400 includes a mounting base 401, a storage component, a dispensing component, and a multi-axis material handling robot 410, which are sequentially arranged on the mounting base 401. The storage component includes a first motor 423 and a mounting member 421. The mounting member 421 is horizontally arranged and can rotate along its own central axis. Specifically, the mounting member 421 is rotatably mounted on the mounting base 401 through the cooperation of a rotating shaft and a bearing. Storage compartments are provided on both sides of the mounting member 421. Each storage compartment includes a first storage cell and a second storage cell arranged vertically. The first storage cell is used to stack the first welded component 820, and the second storage cell is used to stack the second welded component 830. The storage compartments on both sides of the mounting member 421 are symmetrically arranged about the origin of the rotational central axis of the mounting member 421. The first motor 423 drives the mounting member 421 to rotate via belt drive. During operation, a storage compartment filled with the first welded component 820 and the second welded component 830 is opened by the first motor 423. The first welding component 820 and the second welding component 830 are suspended at a predetermined position. The material distribution component pushes the stacked first welding component 820 and the second welding component 830 to the designated position for the multi-axis material handling robot 410 to grasp. When the first welding component 820 and the second welding component 830 in the storage bin are all taken, the first motor 423 drives the mounting component 421 to rotate so that another storage bin filled with the first welding component 820 and the second welding component 830 rotates to a predetermined position. The material distribution component then pushes the stacked first welding component 820 and the second welding component 830 to the designated position for the multi-axis material handling robot 410 to grasp. The setting of two storage bins can make the production process uninterrupted. When one storage bin is empty, it can be immediately switched to the other storage bin with material, so that the multi-axis material handling robot 410 can always grab material when it needs to load, realizing seamless production. Then, the workers can fill the empty storage bin when they have time, thus realizing an uninterrupted loading process.

[0043] Furthermore, the storage compartment has three vertical bars 422 arranged at intervals. The middle bar 422 has a first channel 4221 and a second channel 4222 on both sides. One of the two bars 422 has a first channel 4221 facing the middle bar 422. The two first channels 4221 are combined to form a first storage compartment. The other bar 422 has a second channel 4222 facing the middle bar 422. The two second channels 4222 are combined to form a second storage compartment.

[0044] In other embodiments, the material distribution assembly includes a second motor 428, a first lead screw transmission structure, and a material distribution block 429. The first lead screw transmission structure is vertically arranged, and the material distribution block 429 is mounted on the moving slider of the first lead screw transmission structure. The second motor 428 drives the first lead screw transmission structure to move the material distribution block 429 vertically upward or downward via belt transmission. The material distribution block 429 is provided with two lifting parts. The mounting part 421 is provided with a hollow groove 4211 at the position opposite the first and second storage compartments. When the storage compartment rotates to the top of the lifting parts, the two lifting parts can pass through the hollow groove 4211 and enter the first and second storage compartments respectively. The second motor 428 drives the first lead screw transmission structure to drive the material distribution block 429 vertically upward, thereby pushing the first welded part 820 and the second welded part 830 stacked on the storage compartment to the designated position. The highest point of the storage compartment is the designated position. The material distribution component also includes a first sensor 402 for detecting whether the first welded part 820 and the second welded part 830 are present at the designated position. The first sensor 402 detects the presence of the first welded part 820 and the second welded part 830 at the designated position to determine whether to send a signal to the second motor 428 to drive the material distribution block 429 to rise or stop. When the first sensor 402 detects that there is no material at the designated position, the second motor 428 drives the material distribution block 429 to raise the first welded part 820 and the second welded part 830 to the designated position. When the first welded part 820 and the second welded part 830 rise to the designated position, the first sensor 402 senses the presence of material and sends a signal to the second motor 428 to stop. In addition, it should be noted that the multi-axis picking robot 410 will only come to the designated position to pick up the material after the first sensor 402 senses the presence of material.

[0045] like Figure 5 As shown, the first lead screw transmission structure includes a guide rod 425 and a lead screw 424 that are parallel to each other. The guide sleeve of the guide rod 425 and the lead screw nut of the lead screw 424 are both fixedly connected to the moving slider. The two ends of the first lead screw transmission structure are respectively provided with a second sensor 427 and a third sensor 426 for sensing the moving slider. When the second sensor 427 senses the moving slider, the highest point of the lifting part is level with the designated position. When the third sensor 426 senses the moving slider, the highest point of the lifting part is lower than the mounting part 421. At this time, the position of the material distribution block 429 is in the initial setting state. When the second sensor 427 senses the moving slider, that is, the material in the storage bin has been completely removed, the second motor 428 drives the material distribution block 429 to return to the initial state. When the material distribution block 429 returns to the initial state, it sends a signal to the first motor 423 so that the storage bin with material is moved to the top of the material distribution block 429. The stroke of the material distribution block 429 is determined by the second sensor 427 and the third sensor 426 to ensure that each link is safe and controllable.

[0046] like Figure 6 As shown, the welding device 500 also includes an adjusting base 510. Two welding machines 520 are slidably mounted on the adjusting base 510 via a guide rail slider structure. A third motor and a second lead screw transmission structure are positioned on the adjusting base 510 corresponding to the positions of the welding machines 520. The third motor is connected to the welding machines 520 via the second lead screw transmission structure, allowing the two welding machines 520 to move closer or further apart to accommodate welding refrigerator covers 800 of different specifications. The guide rail slider structure includes two parallel guide rails on the adjusting base 510, with sliding sliders mounted on the guide rails. The bottom of the welding machine 520 is fixedly connected to the sliders. The second lead screw transmission structure includes a lead screw shaft and a lead screw fixing seat. The lead screw fixing seat is fixed to the adjusting base 510, and the lead screw shaft is rotatably mounted on the lead screw fixing seat. The input end of the lead screw shaft is connected to the third motor fixed to the adjusting base 510, and the lead screw nut of the lead screw shaft is connected to the bottom of the welding machine 520.

[0047] Furthermore, such as Figure 7 As shown, the welding machine 520 includes an integrated housing 5201 and a welding structure 521 disposed on the integrated housing 5201. The welding structure 521 includes multiple sets of welding electrode heads 5211 for welding. The welding electrode heads 5211 are slidably connected to the integrated housing 5201 through a guide rail slider structure so that the welding electrode heads 5211 can slide in the horizontal direction. Specifically, the guide rail slider structure includes a guide rail and a slider that can be adapted to the guide rail. The guide rail is fixed to the integrated housing 5201, and the welding electrode heads 5211 are fixed on the slider. An adjustment structure consisting of a lead screw 5213 and a hand crank 5214 is also provided between the welding electrode heads 5211 and the integrated housing 5201. Specifically, the lead screw is rotatably connected to the integrated housing 5201 through a fixed seat, and the lead screw nut on the lead screw is connected to the welding electrode heads 5211. The distance between two adjacent sets of welding electrode heads 5211 can be adjusted by the adjustment structure.

[0048] In some embodiments, such as Figure 8 As shown, the lifting device 120 includes a mounting frame 124, a lifting cylinder 123, and a support plate 122. The mounting frame 124 is mounted on the lower conveyor chain 102. The support plate 122 is slidably connected to the mounting frame 124 through multiple sets of parallel guide rod and guide sleeve structures, so that the support plate 122 can be raised and lowered. The guide rod and guide sleeve structure includes guide rods. The lifting cylinder 123 is fixed in the middle of the mounting frame 124. The cylinder rod of the lifting cylinder 123 is connected to the support plate 122. The side of the support plate 122 used to support the loading tray 300 is provided with a receiving electrode head 121. When the support plate 122 lifts the loading tray 300, the receiving electrode head 121 contacts the loading tray 300. The receiving electrode head 121 is connected to the negative terminal of the welding power source. When the welding machine 520 applies pressure for welding, a conductive circuit is formed to complete the welding of the refrigerator cover 800.

[0049] like Figure 9 As shown, the conveying device 600 includes a gantry frame 650, a first linear module 610, a second linear module 620, a third linear module 630, and a suction cup 640. The gantry frame 650 is mounted above the double-layer speed-multiplying chain device 100. The first linear module 610 is horizontally installed on the gantry frame 650. The second linear module 620 is installed on the motion module of the first linear module 610 via a connecting plate. The second linear module 620 is horizontally positioned, and its orientation is parallel to that of the double-layer speed-multiplying chain device 100. The first linear module 610 is positioned perpendicular to the double-speed chain device 100. The third linear module 630 is mounted on the moving end of the second linear module 620. The suction cup 640 is fixed to the moving end of the third linear module 630. Through the cooperation of the first linear module 610, the second linear module 620, and the third linear module 630, the suction cup 640 can move back and forth between the fourth working station and the transfer device 700. The suction cup 640 is used to pick up the refrigerator cover 800 welded on the fourth working station. It should be noted that the first linear module 610, the second linear module 620, and the third linear module 630 are all ball screw type linear modules. The main components of the ball screw type linear module are: ball screw, linear guide rail, aluminum alloy profile, ball screw support, coupling, motor, photoelectric switch, etc.

[0050] like Figure 10 As shown, the loading tray 300 is provided with a positioning pin 310 at the position of the positioning hole corresponding to the refrigerator cover body 810. The positioning pin 310 and the positioning hole cooperate to fix the position of the refrigerator cover body 810, so as to avoid the refrigerator cover body 810 from falling during transportation.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An automatic welding production line for refrigerator covers, characterized in that: It includes a first conveying device (200), a double-layer speed-double chain device (100), a feeding device (400), a welding device (500), a handling device (600), a second conveying device (900), and a transfer device (700), wherein The double-layer speed-multiplying chain device (100) includes an upper conveyor chain (101) and a lower conveyor chain (102) with opposite conveying directions. Multiple loading trays (300) for positioning the refrigerator cover body (810) are carried on both the upper conveyor chain (101) and the lower conveyor chain (102). The upper conveyor chain (101) is provided with a first working station, a second working station, a third working station and a fourth working station. The lower conveyor chain (102) is equipped with a lifting device (120). The lifting device (120) is directly facing the third working station. The lifting device (120) is used to lift the loading tray (300) that is stopped at the third working station. The first conveying device (200) is connected to one end of the double-speed chain device (100), and the first conveying device (200) is used to transfer the empty loading pallet (300) flowing on the lower conveyor chain (102) to the upper conveyor chain (101). The second conveying device (900) is connected to the other end of the double-speed chain device (100), and the second conveying device (900) is used to transfer the empty loading pallet (300) flowing on the upper conveyor chain (101) to the lower conveyor chain (102). There are two feeding devices (400), which are respectively arranged on both sides of the double-layer double-speed chain device (100). The feeding device (400) includes a storage component, a distribution component, and a multi-axis picking robot (410). The storage component is used to stack the first welded part (820) and the second welded part (830). The distribution component is used to lift the first welded part (820) and the second welded part (830) stacked on the storage component to a designated position, so that the multi-axis picking robot (410) can transport the first welded part (820) and the second welded part (830) that have reached the designated position to the refrigerator cover body (810) positioned on the loading tray (300) stopped at the second working station. The welding device (500) includes two welding machines (520) symmetrically arranged on both sides of the double-speed chain device (100). The welding machines (520) cooperate with the lifting device (120) to weld the first welding part (820) and the second welding part (830) stopped on the loading tray (300) at the third working station to the refrigerator cover body (810). The conveying device (600) is mounted on the fourth working station and is used to convey the welded refrigerator cover (800) to the transfer device (700). The lifting device (120) includes a mounting frame (124), a lifting cylinder (123), and a support plate (122). The mounting frame (124) is mounted on the lower conveyor chain (102). The support plate (122) is slidably connected to the mounting frame (124) through a multi-set guide rod and guide sleeve structure, so that the support plate (122) can move up and down. The lifting cylinder (123) is fixed in the middle of the mounting frame (124). 3) The cylinder rod is connected to the support plate (122), wherein the support plate (122) is provided with a receiving electrode head (121) on one side for supporting the loading tray (300). When the support plate (122) lifts the loading tray (300), the receiving electrode head (121) contacts the loading tray (300). When the welding machine (520) applies pressure for welding, the welding machine (520) and the receiving electrode head (121) form a conductive circuit.

2. The automatic welding production line for refrigerator covers according to claim 1, characterized in that: The storage assembly includes a first motor (423) and a mounting component (421). The mounting component (421) is horizontally arranged and can rotate along its own central axis. Storage compartments are provided on both sides of the mounting component (421). Each storage compartment includes a first storage cell and a second storage cell arranged vertically. The first storage cell is used to stack a first welded component (820), and the second storage cell is used to stack a second welded component (830). The storage compartments on both sides of the mounting component (421) are symmetrically arranged with the rotation central axis of the mounting component (421) as the center. The first motor (423) drives the mounting component (421) to rotate by belt drive.

3. The automatic welding production line for refrigerator covers according to claim 2, characterized in that: The storage compartment has three vertical bars (422) arranged at intervals. The middle bar (422) has a first channel (4221) and a second channel (4222) on both sides. One of the bars (422) on both sides has a first channel (4221) on the side facing the middle bar (422). The two first channels (4221) are combined to form the first storage compartment. The other bar (422) on both sides has a second channel (4222) on the side facing the middle bar (422). The two second channels (4222) are combined to form the second storage compartment.

4. The automatic welding production line for refrigerator covers according to claim 2 or 3, characterized in that: The material distribution assembly includes a second motor (428), a first lead screw transmission structure, and a material distribution block (429). The first lead screw transmission structure is vertically arranged, and the material distribution block (429) is installed on the motion slider of the first lead screw transmission structure. The second motor (428) drives the first lead screw transmission structure to move the material distribution block (429) up or down in the vertical direction through belt transmission. The material distribution block (429) is provided with two lifting parts. The mounting part (421) is provided with a hollow groove (4211) at the position opposite to the first storage cell and the second storage cell. When the storage compartment rotates to the top of the lifting part, the two lifting parts can pass through the hollow groove (4211) and enter the first storage cell and the second storage cell respectively.

5. The automatic welding production line for refrigerator covers according to claim 4, characterized in that: The highest point of the storage compartment is the designated location, and the material distribution component also includes a first sensor (402) for detecting whether there is a first welded part (820) and a second welded part (830) at the designated location.

6. The automatic welding production line for refrigerator covers according to claim 4, characterized in that: The first lead screw transmission structure includes a guide rod (425) and a lead screw (424) that are parallel to each other. The guide sleeve of the guide rod (425) and the lead screw nut of the lead screw (424) are both fixedly connected to the moving slider. The two ends of the first lead screw transmission structure are respectively provided with a second sensor (427) and a third sensor (426) for sensing the moving slider. When the second sensor (427) senses the moving slider, the highest point of the lifting part is level with the designated position. When the third sensor (426) senses the moving slider, the highest point of the lifting part is lower than the mounting part (421).

7. The automatic welding production line for refrigerator covers according to claim 1, characterized in that: The welding device (500) also includes an adjustment base (510). Both welding machines (520) are slidably mounted on the adjustment base (510) via a guide rail slider structure. A third motor and a second lead screw transmission structure are provided on the adjustment base (510) at positions corresponding to the welding machines (520). The third motor is connected to the welding machines (520) via the second lead screw transmission structure, so that the two welding machines (520) can move closer to or further away from each other.

8. The automatic welding production line for refrigerator covers according to claim 7, characterized in that: The welding machine (520) includes an integrated housing (5201) and a welding structure (521) disposed in the integrated housing (5201). The welding structure (521) includes multiple sets of welding electrode heads (5211) for welding. The welding electrode heads (5211) are slidably connected to the integrated housing (5201) through a guide rail slider structure so that the welding electrode heads (5211) can slide in the horizontal direction. An adjustment structure consisting of a lead screw (5213) and a hand crank (5214) is also provided between the welding electrode heads (5211) and the integrated housing (5201) to adjust the distance between two adjacent sets of welding electrode heads (5211).

9. The automatic welding production line for refrigerator covers according to claim 1, characterized in that: The conveying device (600) includes a gantry (650), a first linear module (610), a second linear module (620), a third linear module (630), and a suction cup (640). The gantry (650) is mounted above the double-speed chain device (100). The first linear module (610) is horizontally mounted on the gantry (650). The second linear module (620) is mounted on the motion module of the first linear module (610) via a connecting plate. The second linear module (620) is horizontally positioned, and its orientation is parallel to that of the double-speed chain device (100). The linear module (610) is set in a direction perpendicular to the direction of the double-speed chain device (100). The third linear module (630) is installed on the moving end of the second linear module (620). The suction cup (640) is fixed to the moving end of the third linear module (630). Through the cooperation of the first linear module (610), the second linear module (620) and the third linear module (630), the suction cup (640) can move back and forth between the fourth working station and the transfer device (700). The suction cup (640) is used to pick up the refrigerator cover (800) welded on the fourth working station.

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